Note anchors in discussions could be more discoverable and useful
Description
A common activity during a discussion on an issue or MR is to link to some other discussion. To facilitate this, each note in a discussion gets its own anchor on the discussion page, and clickable links are provided in the timestamp for each discussion.
In MRs, there are also links to "the discussion" itself - again in the timestamp - although this is disabled if a discussion is on an "outdated diff". You have to expand the discussion then choose a specific note within it.
Actually clicking any of these links in your browser is essentially a no-op; the page URL changes to that anchor, and your screen moves a tiny bit. The primary purpose of them being links is so you can right-click, 'copy URL', and paste the link into a discussion on another tab. You have to discover that these links exist at all, and then have a relatively wide knowledge of browsers and URLs, before connecting all these dots together.
Proposal
Enable the anchors for outdated discussions; it's just as likely we'll need to link to one of those as an active discussion elsewhere.
Introduce a little permalink or copy-and-paste icon that, when clicked, puts the note URL into the clipboard, in the same way we do for commit IDs. I'm a little worried that scattering these throughout a discussion page might make it ugly, but if we can do it tastefully, it will improve the discoverability and usefulness of this feature.